Adjustable stop for machine tabletop



FIG. 1 is a perspective top, front, right side view of an adjustable stop for a machine tabletop embodying my design;

FIG. 2 is a top plan view thereof, the bottom view being a mirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a left side elevational view thereof; and,

FIG. 6 is a right side elevational plan view thereof. 

The ornamental design for an adjustable stop for machine tabletop, as shown and described. 